EP 1001174 A1 2000-05-17 - HYDRAULIC CYLINDER

Title (en)

Title (de)

Title (fr)

Publication

Application

Priority

JP 9902788 W 19990527

JP 14946798 A 19980529

JP 15005098 A 19980529

Abstract (en)

A hydraulic cylinder, wherein a recessed part (21) as an axial press-fitting part is formed at an end face (20) of a piston (4) on a piston rod (3) side, the tip end of the piston rod (3) is press-fitted to the recessed part (21) of the piston (4) so as to assure a coaxiality, axial screw holes (24) are opened in a tip end face (23) of the piston rod (3), axial bolt through holes (25) are opened in the piston (4), bolts (22) are inserted from the bolt through holes (25) into the screw holes (24) and tightened with the end face (20) of the piston (4) in opposite contact with the tip end face (23) of the piston rod (3) so as to fix the piston (4) for connecting it to the piston rod (3), whereby the strength of a piston connection part can be increased with simple structure without using a special high-strength material for the piston rod or without heat-treating the piston rod. <IMAGE>